![Tehama County](http://ucanr.edu/sb3/display/photos/34.jpg)
University of California
Tehama County
HLB still in the news
![This citrus tree's leaves are yellowing due to huanglongbing. This citrus tree's leaves are yellowing due to huanglongbing.](http://ucanr.org/blogs/anrnews/blogfiles/11062.jpg)
This citrus tree's leaves are yellowing due to huanglongbing.
The greatest immediate threat may be to the homeowners of Los Angeles County, 60 percent of who have a citrus tree in their yard, said Elizabeth Grafton-Cardwell, UC Cooperative Extension specialist and research entomologist in the Department of Entomology at UC Riverside and director of Lindcove Research & Extension Center.
The citrus greening bacteria probably spread from the cutting of budwood illegally brought in from outside the country, the article says Grafton-Cardwell said.